Has anyone been pre-approved for the refund advance and their return accepted by the IRS and not received it yet? It’s been like 6 hours since my return was accepted.

are you sure it was accepted and not just successfully submitted because the IRS doesn't open e-filing until 1/29? if you did get an acceptance e-mail contact support but the reason could be that Turbotax isn't open so your refund advance will pop up tomorrow.